Acids and Bases.

Slides:

Advertisements

Similar presentations

PH. Acids Anything that produces H 3 O+ ions if dissolved in water Taste sour Turns blue litmus paper red When acids dissolve in water, it donates a H+ion.

Advertisements

PH The wonders of water!. Acids Any compound that GIVES OFF H+ ions in solution Any compound that GIVES OFF H+ ions in solution Ex. HCl H+ and Cl- Ex.

Acids, Bases, and pH Part 2. Properties of Acids Acids: –Taste Sour (never use taste to test the presence of an acid) –Are Electrolytes –Are Corrosive.

Chapter 9 – Acids and Bases BELLWORK Pure vinegar is an acid, called ________ acid.

Acids and Bases Chapter 24. Acids… Definition: When an acid dissolves in water, H+ ions (charger particles) are formed H+

Acids & Bases They are everywhere.. In your food In your house EVEN IN YOU!!!!!

Unit: Chemical Interactions Chapter 8: Solutions When substances dissolve to form solutions, the properties of the mixture change. 8.1: A solution is a.

Chapter 6.3 Acids, Bases, and pH. What are acids? substances that give up (donate) hydrogen ions when you dissolve them in water. the donated hydrogen.

Properties of Matter Investigation 4. Acids and Bases  An acid is a compound that releases hydrogen ions in water.  The word “acid” comes form the Latin.

Acids, Bases, and pH Chapter 9 Section 1.

Chapter 9 Section 1.  D12 - Explain the chemical composition of acids and bases, and explain the change of pH in neutralization reactions.

The chemical of life. Acids Sour taste, leaves burning sensation Increase hydrogen ions (H+) in solution.

Acids and Bases Chapter Properties of Acids Sour taste Acids turn litmus paper from blue to red Neutralize a base Disassociate in water to form.

pH, Acidic and Basic Solutions

LEQ: What techniques in the lab setting will be used to identify acids and bases?

 Bonds of Water- strong › Can break into hydrogen ion (H + ) and hydroxide ion (OH - ) H 2 O  H + + OH -

Exploring Acids and Bases What are the properties of acids and bases?

Acids, Bases, and pH Essential Question Explain the differences between acids and bases and give examples of each.

ACIDS AND BASES Sections 8.3 and 8.4. Acids A acid is a compound that produces hydronium (H 3 O + ) ions when dissolved in water. Examples: HCl – hydrochloric.

Acids are electrolytes that: þ Produce H + (as H 3 O + ) ions in water – always listed first in the formula þ Turn blue litmus red þ Taste sour þ Corrode.

Acids & Bases Chapter Chapter 10 Chemical Compounds Ionic Compounds  Formed by oppositely charged ions  Metal and nonmetal  Properties  Brittle.

Acids  Substances that donate hydrogen ions (H + ) to water to form H 3 O +  Called the hydronium ion  Examples of Acids  HCl hydrochloric acid used.

Acids and Bases. What is an acid? An acid is a solution that has an excess of H+ ions. It comes from the Latin word acidus that means "sharp" or "sour".

Acids / Bases Foster ESS Study this for the Quiz.

COMMON SENSE IS LIKE DEODORANT, THE PEOPLE WHO NEED IT THE MOST NEVER USE IT.

Acids/Bases and the pH Scale

Chapter 8 Acids, Bases, and pH.

Acids and Bases The pH scale What do vinegar, lemons, and orange juice have in common?

Acids, Bases and pH. 1. Acids Any compound that GIVES OFF H+ ions in solution Any compound that GIVES OFF H+ ions in solution Ex. HCl H+ and Cl- Ex. HCl.

ACIDS and BASES Target: I will be able to define what makes something an acid or a base. I will be able to tell on a pH scale if something is an acid or.

Acids and Bases. Acid: A compound that when written, generally has hydrogen written first Produces hydronium ions (H 3 O + ) when dissolved in water.

Chapter 25 Acids and Bases. Acids Contain at least one hydrogen atom that can be removed when the acid is dissolved in water Example: HCl (hydrochloric.

Acids & Bases. pH scale Ranges from 1-14 Ranges from – 6 = Acid 1 – 6 = Acid 1 is most acidic 1 is most acidic Concentration of H + (hydrogen)

1 4.7 Acids and Bases. Properties of Acids and Bases Acid Base - pH 7 - tastes sour- tastes bitter - no special feel- feels slippery - turns blue litmus.

Acids and Bases.

Physical Change A change that alters the form or appearance of a substance but does NOT make the material into another substance –Example: ripping paper,

Acids and Bases. Acids When acids dissolve in water, they ionize (form ions). When acids ionize, they form H+ ions. These H+ ions give acids their properties.

Acids, Bases, and pH. Acids Produces H + in water forming H 3 O + ions (hydronium) Corrosive Sour Feels squeaky Conduct electricity: stronger the acid.

Science Survey ACIDS AND BASES. ACIDS Acids donate H+ ions to form hydronium ions, H when dissolved in water. Acids have a pH of less than 7. pH=

Acids, Bases and the pH scale. pH scale pH stands for “potential of Hydrogen” The pH scale is a range of values from 0-14 that express the concentration.

P.Sci. Unit 11 Cont. Solutions, Acids, and Bases Chapter 8.

Acids and Bases.

Acids, Bases, and Salts. pH pH – measure of the concentration of H + ions in a solution or how acidic or basic it is. Scale ranges from 0-14 Strong acids.

1. ACIDS AND BASES Name some acids and bases that are familiar to you. 2.

Acids & Bases. What are Acids and Bases..? What do we think about when we hear the words acids or bases? Sometimes we tend to think of a chemistry laboratory.

Mrs. Brostrom Integrated Science.  An acid is any compound that increases the number of hydronium ions (H 3 O + ) when dissolved in water  The hydronium.

Acids and Bases. Have you ever wondered, “Why do foods taste sour or bitter?”

Acids & Bases They are everywhere.. In your food In your house EVEN IN YOU!!!!! Ch

Acids and Bases. Acid: Any substance that gives a H + ion when dissolved in water. –Results in an excess of H 3 O + (hydronium) ions in a solution.

Acids & Bases. Indicators Indicators contain certain dyes which change color at various pH values. Indicators contain certain dyes which change color.

Physical Science Chapter 9.2.  Create a sour taste in foods (lemons)  React with metals to produce hydrogen gas (H 2 )  Change color of blue litmus.

Properties of Acids and Bases Acids Bases *Taste sour*Taste Bitter *Turns blue litmus paper red*Turns red litmus paper blue *Reacts with metals*Produces.

1 Acids and Bases Can you name some common acids and bases that we use everyday?

19-2 Describing Acids and Bases

Warm Up 4/14 How many protons and neutrons would an H+ ion have?

Acids, Bases, & Salts. Acids  Acid= any compound that increases the number of hydrogen ions (H + ) (H 3 O + )when dissolved in water  Tastes sour 

Chapter Nine: Acids, Bases and Solutions 9.1 Water and Solutions 9.2 Acids, Bases, and pH.

1 Acids and Bases Can you name some common acids and bases that we use everyday?

Acids, Bases & Salts Acids & Bases  Definitions  Properties  Uses.

Can you name some common acids and bases that we use everyday?

ACIDS AND BASES.

Chapter 14 & 15.1 Acids, Bases, and pH

Acids, Bases, & pH.

Acids and Bases Chapter 23

PH scale A. A measurement system to indicate the concentration of H+ (hydrogen ions) 1. The pH scale ranges from Water is made up of H+ and OH-

Acids and Bases.

Ch Acids & Bases.

Describing Acids and Bases

Acids and Bases.

Presentation transcript:

Acids and Bases

Acids Acids are compounds that add (H+) ions to water when in a solution. In Water HCl: a very strong acid. In water it breaks up (dissociates) and adds H+ to the water. H+ Cl-

Bases Bases are compounds that add (OH-) ions to water when in a solution. In water NaOH: a very strong base. In water it breaks up (dissociates) and adds OH- to the water. H+ O2- Na+

Common Acids Many foods are acidic: Tomatoes Lemons Oranges Limes Apples vinegar Acids taste sour and feel squeaky when you rub them between your fingers

Common Bases Many cleaners are basic: Soap Bleach ammonia (Windex) Bases taste bitter and feel slippery when you rub them between your fingers

Are antacids acids or bases? Question #1 Are antacids acids or bases? Why?

Safety Acids are corrosive! They can burn your skin or eyes. Bases are caustic! They can burn your skin or eyes. Why do you think the safety sign for acids and bases is the same sign?

Other Terms Strong acids and bases—ionize (dissolve) completely in water, adding many ions to the water Weak acids and bases—do not ionize (dissolve) completely in water, adding fewer ions to the water.

The pH Scale

Litmus Paper Acids are indicated by a Red color. If Red litmus paper is dipped in an acid it will stay Red If Blue litmus paper is dipped in an acid it will turn Red

Litmus Paper Bases are indicated by a Blue color. If Blue litmus paper is dipped in a base it will stay blue If Red litmus paper is dipped in a base it will turn Blue

Question #2! What is the difference between the pH scale and litmus paper?

Acid-Base Reactions: Neutralization Neutralization Reaction: When acids and bases are mixed together, they neutralize each other. If an equal concentration of acid and base are mixed, they make a neutral solution of a salt and water HCl + NaOH —> H2O + NaCl Acid Base Water Salt H+ O2-

Titration (Lab Process) The lab process where this is studied is called titration and it uses a piece of glassware called a buret.

Acid Rain Acid Rain: Plants and animals need water close to neutral (pH 7) to survive. Due to pollution from industries and cars, rain in certain areas can be acidic. Rain less than pH 5.6 is called acid rain. Acid rain can kill plants, cause asthma, and other physical problems. Because statues and landmarks are made of limestone (a base), acid rain will also slowly destroy them.

Acid Rain (cont) The Roman ruins, the pyramids of Egypt, and other treasures of the world are slowly being reacted away by acid rain. More damage has been done in the last century than in the last 2,000 years.

Acid Rain (cont) Why do you think there has been more damage from acid rain in the last 100 years?

Let’s See What You Know… B D C A E F H J G I

Part II….

Part III A B B B A A

TAKS Practice

TAKS Practice

TAKS Practice

TAKS Practice

Venn Diagram of Acids and Bases At least 3 points about Acids and Bases At least 2 points about what they have in common